Microsoft
Visual Studio
Visual Studio
  • Home
    • Problems
    • Suggestions
  • Downloads
    • Visual Studio IDE
    • Visual Studio Code
    • Azure DevOps
    • Team Foundation Server
    • Accounts and Subscriptions
  • Subscriber Access
      • Microsoft 365
      • Azure
      • Office 365
      • Dynamics 365
      • SQL
      • Windows 10
      • Windows Server
      • Enterprise Mobility + Security
      • Power BI
      • Teams
      • Visual Studio
      • Surface for Business
      • AI
      • Internet of Things
      • Azure Cognitive Services
      • Quantum
      • Research
      • Docs
      • TechNet
      • Developer Network
      • Windows Dev Center
      • Windows IT Pro Center
      • FastTrack
      • Partner Network
      • Solution Providers
      • Partner Center
      • Cloud Hosting
      • Education
      • Financial services
      • Government
      • Health
      • Manufacturing & resources
      • Retail
      • Security
      • Licensing
      • AppSource
      • Azure Marketplace
      • Events
    • View all
    Sign in

    Developer Community
    Get help from our community supported forum
    • Home /
    • Visual Studio /
    Searched and didn’t find your feedback?
    • Visual Studio
    • Visual Studio for Mac
    • .NET
    • C++
    • Azure DevOps
    • Azure DevOps Server (TFS)
    or
    • Visual Studio
    • Visual Studio for Mac
    • .NET
    • C++
    • Azure DevOps
    • Azure DevOps Server (TFS)
    Visual Studio
    Visual Studio for Mac
    .NET
    C++
    Azure DevOps
    Azure DevOps Server (TFS)
    4

    Migrating from VS2017 15.4 to 15.5.2 causes CS0246 - "The type or namespace name XXX could not be found..."

    windows 6.1visual studio 2017 version 15.5debuggereditor

    avatar image Jessy Lou reported Dec 17, 2017 at 11:31 AM

    Show comments 12

    Add comment

    I have installed the fix by upgrading to the latest version of Visual Studio. The issue is still not fixed:

    10 |10000 characters needed characters left characters exceeded
    avatar image Daan Buijs Dec 18, 2017 at 01:43 PM
    0
    • Share
    avatar image laogolf Dec 18, 2017 at 04:51 PM
    0
    • Share
    avatar image laogolf Jan 02, 2018 at 09:24 PM laogolf
    0
    • Share
    avatar image Kevin Pilch [MSFT] Jan 02, 2018 at 10:20 PM laogolf
    0
    • Share
    avatar image Kevin Pilch [MSFT] Dec 18, 2017 at 11:37 PM
    0
    • Share
    avatar image Echo Deng (MSFT) [MSFT] Dec 19, 2017 at 09:01 AM
    0
    • Share
    avatar image Tobias Demski Dec 20, 2017 at 03:04 PM
    0
    • Share
    avatar image Jessy Lou Dec 21, 2017 at 04:03 PM
    0
    • Share
    avatar image Viktor Veis [MSFT] Dec 22, 2017 at 06:08 PM
    0
    • Share
    avatar image Huizhong Long [MSFT] Jan 05, 2018 at 01:10 AM
    0
    • Share
    avatar image Anson Horton [MSFT] Jan 21, 2018 at 10:21 PM
    0
    • Share
    avatar image Jessy Lou Jan 26, 2018 at 07:15 AM
    0
    • Share
    thub.nodes.view.add-new-comment
    Add comment

    Solutions

    Solution

    by David Partington    Dec 29, 2017 at 11:39 AM
    avatar image

    Unchecking the Allow Parallel Project Initialisation seems to have fixed it.

    1
    Show comments 0 Share

    Add comment

    I have installed the fix by upgrading to the latest version of Visual Studio. The issue is still not fixed:

    10 |10000 characters needed characters left characters exceeded
    thub.nodes.view.add-new-comment
    Add comment

    Solution

    by Bran Zeng    Jan 09, 2018 at 03:43 AM
    avatar image

    ,

    For me I think this is a Visual Studio reflection function stopping issue, add a new class will fire reflection function and all CS0246 errors clear.

    0
    Show comments 0 Share

    Add comment

    I have installed the fix by upgrading to the latest version of Visual Studio. The issue is still not fixed:

    10 |10000 characters needed characters left characters exceeded
    thub.nodes.view.add-new-comment
    Add comment

    Solution

    by Tobias Demski    Dec 22, 2017 at 06:36 PM
    avatar image

    I just er installed the Visual Studio application and it was still bugged. Tried your Brother ideas of deleting the .vs folder and unchecked the flag.

    Now i moved back to an older version of Visual Studio and got no Problems yet.

    0
    Show comments 0 Share

    Add comment

    I have installed the fix by upgrading to the latest version of Visual Studio. The issue is still not fixed:

    10 |10000 characters needed characters left characters exceeded
    thub.nodes.view.add-new-comment
    Add comment
    Follow

    Related Problems

    In C# Refactor Rename (CTRL-R, CTRL-R) often doesn't work
    1 Solution

    Regex search results different - Find All vs Find Next
    0 Solution

    VS 2017 Community Hangs When Developing Xamarin App
    7 Solution

    Creating a new console application
    1 Solution

    C# wrong curly bracket indentation
    0 Solution

    Migrating from VS2017 15.4 to 15.5 causes CS026 - "The type or namespace name XXX could not be found..."
    3 Solution

    Natvis: function call not allowed
    1 Solution

    SSIS Script Task losing code
    10 Solution

    C++ Compiler Generates Access Violation Code when GCC does not
    0 Solution

    Debugger crash on Shift-F9 on a Linq expression
    2 Solution

    What's new

    • NEW Surface Pro 6
    • NEW Surface Laptop 2
    • NEW Surface Go
    • Xbox One X
    • Xbox One S
    • VR & mixed reality
    • Windows 10 apps
    • Office apps

    Store & Support

    • Account profile
    • Download Center
    • Sales & support
    • Returns
    • Order tracking
    • Store locations
    • Support
    • Buy online, pick up in store

    Education

    • Microsoft in education
    • Office for students
    • Office 365 for schools
    • Deals for students & parents
    • Microsoft Azure in education

    Enterprise

    • Microsoft Azure
    • Enterprise
    • Data platform
    • Find a solution provider
    • Microsoft partner resources
    • Microsoft AppSource
    • Manufacturing & resources
    • Financial services

    Developer

    • Microsoft Visual Studio
    • Windows Dev Center
    • Developer Network
    • TechNet
    • Microsoft developer program
    • Channel 9
    • Office Dev Center

    Company

    • Careers
    • About Microsoft
    • Company news
    • Privacy at Microsoft
    • Investors
    • Diversity and inclusion
    • Accessibility
    • Security
    English (United States)
    • Sitemap
    • Contact us
    • Privacy & cookies
    • Terms of use
    • Trademarks
    • Safety & eco
    • About our ads
    • © Microsoft 2018
    • Anonymous
    • Sign in
    • Spaces
    • Visual Studio
    • Visual Studio for Mac
    • .NET
    • C++
    • Azure DevOps
    • Azure DevOps Server (TFS)
    • Explore
    • Topics
    • Problems
    • Features
    • Users
    • Badges